Year	current US$
1960	124000000
1961	135000000
1962	148000000
1963	163000000
1964	204000000
1965	200000000
1966	221000000
1967	238000000
1968	271000000
1969	326000000
1970	423000000
1971	455000000
1972	479000000
1973	792000000
1974	1202000000
1975	1012000000
1976	619000000
1977	786000000
1978	968000000
1979	1091000000
1980	1883000000
1981	1856000000
1982	1629000000
1983	1822000000
1984	2033000000
1985	2245000000
1986	1332000000
1987	2168000000
1988	2516000000
1989	3015000000
1990	3910000000
1991	3410000000
1992	3755000000
1993	3762000000
1994	3018000000
1995	3642000000
1996	5095000000
1997	5007000000
1998	3543000000
1999	5157000000
2000	7921000000
2001	6534000000
2002	8328000000
2003	9508000000
2004	13475000000
2005	24109000000
2006	31862000000
2007	44396000000
2008	63914000000
2009	40828000000
2010	50595000000
2011	67310000000
2012	71093000000
2013	68247000000
2014	59170000000
2015	33181000000
2016	27589000000
2017	34613000000
2018	40758000000
2019	35432000000
2020	22135000000
2021	34472000000
2022	51275000000
2023	38351000000